International space station

1. It ensures that the astronauts are safe

1.1. In the stations they try to find out

1.1.1. They try to find out how materials behave outside the influence of gravity.

2. The international space station helps humans study a lot of things in space.

2.1. It is a laboratory that humans can learn about human health

2.1.1. It also helps people learn about biology

3. The international space station is a stepping stone or going further into space.

3.1. In the video it says that people can take pictures from the station so they see new planets

3.1.1. People can see new planets so that they can try to find other life forms